Free Trial
→ The Man I Turn to In Times Like This (From Stansberry Research) (Ad) Buy PRTA Stock  Free PRTA Stock Alerts

Prothena (PRTA) Institutional Ownership

Prothena logo
$8.50 -0.22 (-2.52%)
Closing price 05/2/2025 04:00 PM Eastern
Extended Trading
$8.56 +0.06 (+0.76%)
As of 05/2/2025 07:31 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
Compare

Institutional Ownership Changes (13F Filings) for Prothena (NASDAQ:PRTA)

Current
Institutional Ownership
Percentage
97.08%
Number of
Institutional Buyers
(last 12 months)
73
Total
Institutional Inflows
(last 12 months)
$113.76M
Number of
Institutional Sellers
(last 12 months)
38
Total
Institutional Outflows
(last 12 months)
$74.45M
Get PRTA Insider Trade Alerts

Want to know when executives and insiders are buying or selling Prothena stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily.

Skip Chart & View Institutional Buying and Selling Data

PRTA Institutional Buying and Selling by Quarter

Prothena Major Shareholders & Ownership History

Export to Excel
Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
4/30/2025 Alps Advisors Inc.37,956$470K0.0%-12.8%0.071%
4/29/2025 Bank of New York Mellon Corp146,009$1.81M0.0%-2.8%0.271%
4/24/2025 HighMark Wealth Management LLC2,018$25K0.0%-81.9%0.004%
4/22/2025 Cambridge Investment Research Advisors Inc.10,164$126K0.0%N/A0.019%
4/21/2025 Duncan Williams Asset Management LLC88,339$1.09M0.4%+27.7%0.164%
4/15/2025 SG Americas Securities LLC72,559$898K0.0%+92.9%0.135%
4/10/2025 Hennion & Walsh Asset Management Inc.77,637$961K0.0%+48.5%0.144%
4/8/2025 Rhumbline Advisers66,079$818K0.0%-1.5%0.123%
4/7/2025 GAMMA Investing LLC6,002$74K0.0%+4,626.0%0.011%
3/24/2025Wellington Management Group LLP5,130,876$71.06M0.0%+22.8%9.532%
2/17/2025UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC381,508$5.28M0.0%-27.6%0.709%
2/17/2025Two Sigma Investments LP38,394$532K0.0%+265.4%0.071%
2/17/2025Rafferty Asset Management LLC77,672$1.08M0.0%+24.8%0.144%
2/17/2025ProShare Advisors LLC14,524$201K0.0%+29.5%0.027%
2/17/2025Prosight Management LP418,122$5.79M1.6%-13.5%0.777%
2/17/2025Man Group plc77,430$1.07M0.0%+90.7%0.144%
2/17/2025Millennium Management LLC123,005$1.70M0.0%+9.3%0.229%
2/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.27,269$381K0.0%+6.0%0.051%
2/17/2025Deutsche Bank AG95,970$1.33M0.0%+195.7%0.178%
2/17/2025Cresset Asset Management LLC19,434$269K0.0%-20.4%0.036%
2/17/2025Cary Street Partners Financial LLC12,500$173K0.0%N/A0.023%
2/17/2025Balyasny Asset Management L.P.38,021$527K0.0%N/A0.071%
2/17/2025Bank of America Corp DE119,007$1.65M0.0%+45.0%0.221%
2/17/2025BNP Paribas Financial Markets97,383$1.35M0.0%+74.4%0.181%
2/14/2025Boxer Capital Management LLC690,000$9.56M0.8%N/A1.282%
2/14/2025PDT Partners LLC127,203$1.76M0.2%+15.0%0.236%
2/14/2025Northern Trust Corp404,496$5.60M0.0%+8.5%0.752%
2/14/2025The Manufacturers Life Insurance Company 70,184$972K0.0%-18.5%0.130%
2/14/2025Birchview Capital LP304,574$4.22M3.4%+45.3%0.566%
2/14/2025Susquehanna Fundamental Investments LLC80,677$1.12M0.0%N/A0.150%
2/14/2025Virtus ETF Advisers LLC5,148$71K0.0%+19.3%0.010%
2/14/2025Voya Investment Management LLC12,829$178K0.0%-8.1%0.024%
2/14/2025RBF Capital LLC29,200$404K0.0%-35.6%0.054%
2/14/2025Price T Rowe Associates Inc. MD3,685,708$51.05M0.0%-3.6%6.850%
2/14/2025Hsbc Holdings PLC24,179$323K0.0%+60.4%0.045%
2/14/2025Rock Springs Capital Management LP644,601$8.93M0.3%+3.1%1.198%
2/14/2025Tower Research Capital LLC TRC 16,826$233K0.0%+208.3%0.031%
2/14/2025Dimensional Fund Advisors LP864,833$11.98M0.0%+1.3%1.607%
2/13/2025XTX Topco Ltd18,665$259K0.0%+19.9%0.035%
2/13/2025Mariner LLC343,917$4.76M0.0%+6.4%0.639%
Elon’s Terrifying Warning Forces Trump To Take Action (Ad)

Elon Musk has avoided two major financial crises before. He pulled Tesla and SpaceX back from the brink of collapse and built two of the most valuable companies in history. Now, he's sounding the alarm about America's $36 trillion debt time bomb that could destroy the fabric of our society.As head of the Department of Government Efficiency (DOGE) under President Trump, Musk is exposing just how bad things are...

Get your free gold guide!
2/13/2025Barclays PLC105,338$1.46M0.0%+10.6%0.196%
2/13/2025Raymond James Financial Inc.13,111$182K0.0%N/A0.024%
2/13/2025Renaissance Technologies LLC201,900$2.80M0.0%+10.4%0.375%
2/13/2025Legal & General Group Plc41,405$573K0.0%-3.7%0.077%
2/13/2025Invesco Ltd.42,846$593K0.0%+4.0%0.080%
2/13/2025FMR LLC8,071,309$111.79M0.0%+0.1%15.000%
2/13/2025Federated Hermes Inc.746,177$10.34M0.0%+84.3%1.387%
2/13/2025Finepoint Capital LP657,071$9.10M0.6%+51.6%1.221%
2/13/2025Wells Fargo & Company MN52,823$732K0.0%-20.2%0.098%
2/12/2025 Massachusetts Financial Services Co. MA44,815$621K0.0%N/A0.083%
2/12/2025Headlands Technologies LLC7,330$102K0.0%+196.5%0.014%
2/12/2025Geode Capital Management LLC964,308$13.36M0.0%+0.1%1.792%
2/12/2025Franklin Resources Inc.19,687$273K0.0%N/A0.037%
2/12/2025Wellington Management Group LLP5,130,876$71.06M0.0%+22.8%9.535%
2/12/2025Norges Bank57,454$796K0.0%N/A0.107%
2/12/2025JPMorgan Chase & Co.387,350$5.37M0.0%+93.7%0.720%
2/11/2025Corebridge Financial Inc.21,140$293K0.0%-7.0%0.039%
2/11/2025Vanguard Group Inc.1,403,838$19.44M0.0%+11.5%2.609%
2/11/2025KLP Kapitalforvaltning AS12,900$179K0.0%N/A0.024%
2/11/2025American Century Companies Inc.30,399$421K0.0%+66.1%0.056%
2/11/2025DCF Advisers LLC103,500$1.43M0.7%-3.7%0.192%
2/11/2025 Teacher Retirement System of Texas10,434$145K0.0%N/A0.019%
2/10/2025Thrivent Financial for Lutherans38,626$535K0.0%-18.7%0.072%
2/10/2025Connor Clark & Lunn Investment Management Ltd.91,840$1.27M0.0%-25.0%0.171%
2/7/2025Amundi1,954$28K0.0%-85.7%0.004%
2/7/2025 Foundation Wealth Management LLC19,471$270K0.2%N/A0.036%
2/6/2025Raymond James Financial Inc.13,111$182K0.0%N/A0.024%
2/6/2025Charles Schwab Investment Management Inc.327,151$4.53M0.0%+0.7%0.608%
2/5/2025Purkiss Capital Advisors LLC10,729$149K0.1%N/A0.020%
2/4/2025 Bank of New York Mellon Corp150,238$2.08M0.0%+14.9%0.279%
2/3/2025 Handelsbanken Fonder AB20,900$289K0.0%+35.7%0.039%
1/31/2025 HighMark Wealth Management LLC11,168$155K0.1%-32.3%0.021%
1/30/2025 Rhumbline Advisers67,115$930K0.0%+1.8%0.125%
1/28/2025 Focused Wealth Management Inc32,129$445K0.1%N/A0.060%
1/24/2025 China Universal Asset Management Co. Ltd.11,409$158K0.0%+10.3%0.021%
1/24/2025Chicago Partners Investment Group LLC11,197$159K0.0%N/A0.021%
1/21/2025 Duncan Williams Asset Management LLC69,199$958K0.4%+41.9%0.129%
1/17/2025 SG Americas Securities LLC37,612$521K0.0%+167.0%0.070%
1/15/2025 Hennion & Walsh Asset Management Inc.52,284$724K0.0%N/A0.097%
12/26/2024JPMorgan Chase & Co.199,986$3.35M0.0%-32.4%0.372%
11/19/2024Barclays PLC95,222$1.59M0.0%+110.2%0.177%
11/16/2024Geode Capital Management LLC963,479$16.12M0.0%-3.1%1.792%
11/15/2024Barclays PLC95,222$1.59M0.0%+110.2%0.177%
11/15/2024Orion Portfolio Solutions LLC17,531$293K0.0%+4.4%0.033%
11/15/2024XTX Topco Ltd15,564$260K0.0%N/A0.029%
11/15/2024Wellington Management Group LLP4,178,788$69.91M0.0%+14.8%7.770%
11/15/2024State Street Corp1,674,909$28.02M0.0%-13.3%3.114%
11/15/2024Systematic Financial Management LP8,125$136K0.0%-95.8%0.015%
11/15/2024Janus Henderson Group PLC18,047$301K0.0%-98.2%0.034%
11/14/2024PDT Partners LLC110,654$1.85M0.2%+7.7%0.206%
Here’s How to Claim Your Stake in Elon’s Private Company, xAI (Ad)

I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new millionaires than any tech advance in history. And for a limited time, you have the chance to claim a stake in this project, even though it’s housed inside Elon’s private company, xAI.

All the details are waiting for you now — but you need to act before the May 1st funding window clos
11/14/2024UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC526,748$8.81M0.0%+1,122.9%0.979%
11/13/2024BNP Paribas Financial Markets55,842$934K0.0%+44.6%0.104%
11/13/2024FMR LLC8,066,983$134.96M0.0%+0.0%15.000%
11/13/2024The Manufacturers Life Insurance Company86,071$1.44M0.0%+3.8%0.160%
11/13/2024Dynamic Technology Lab Private Ltd25,764$432K0.0%N/A0.048%
11/12/2024Algert Global LLC72,961$1.22M0.0%-5.5%0.136%
11/12/2024Charles Schwab Investment Management Inc.324,962$5.44M0.0%-0.7%0.604%
11/9/2024Primecap Management Co. CA35,500$594K0.0%-2.7%0.066%
11/9/2024Intech Investment Management LLC12,555$210K0.0%N/A0.023%
11/8/2024Connor Clark & Lunn Investment Management Ltd.122,492$2.05M0.0%+8.6%0.228%
(Data available from 1/1/2016 forward)

PRTA Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of PRTA shares?

During the previous two years, 151 institutional investors and hedge funds held shares of Prothena. The most heavily invested institutionals were FMR LLC ($111.79M), Wellington Management Group LLP ($71.06M), Price T Rowe Associates Inc. MD ($51.05M), Armistice Capital LLC ($32.20M), State Street Corp ($28.02M), Artal Group S.A. ($24.80M), and Boxer Capital LLC ($24.17M).Learn more on PRTA's institutional investors.

What percentage of Prothena stock is owned by institutional investors?

97.08% of Prothena stock is owned by institutional investors. Learn more on PRTA's institutional investor holdings.

Which institutional investors have been buying Prothena stock?

Of the 129 institutional investors that purchased Prothena stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Wellington Management Group LLP ($3.40M), FMR LLC ($2.94M), Armistice Capital LLC ($742K), Boxer Capital Management LLC ($690K), Artal Group S.A. ($500K), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($483.67K), and Price T Rowe Associates Inc. MD ($417.34K).

How much institutional buying is happening at Prothena?

Institutional investors have bought a total of 14,216,297 shares in the last 24 months. This purchase volume represents approximately $458.09M in transactions.

Which Prothena major shareholders have been selling company stock?

Of the 69 institutional investors that sold Prothena stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Janus Henderson Group PLC ($1.73M), First Light Asset Management LLC ($1.07M), PFM Health Sciences LP ($646.83K), Prosight Management LP ($392.44K), Dimensional Fund Advisors LP ($318.90K), SG Americas Securities LLC ($265.47K), and State Street Corp ($257.56K).

How much institutional selling is happening at Prothena?

Institutional investors have sold a total of 6,707,858 shares in the last 24 months. This volume of shares sold represents approximately $212.02M in transactions.


Related Companies

This page (NASDAQ:PRTA) was last updated on 5/3/2025 by MarketBeat.com Staff
From Our Partners
Think NVDA’s run was epic? You ain’t seen nothin’ yet
Ask most investors and they’ll probably tell you Nvidia is the undisputed AI stock of the decade. In 2023, ...
Timothy Sykes | Sponsored
Elon’s Terrifying Warning Forces Trump To Take Action
Elon Musk has avoided two major financial crises before. He pulled Tesla and SpaceX back from the brink of col...
American Hartford Gold | Sponsored
Elon Set to Shock the World by May 1st ?
Tech legend Jeff Brown recently traveled to the industrial zone of South Memphis to investigate what he believ...
Brownstone Research | Sponsored
Trump’s Bitcoin Reserve is No Accident…
Bryce Paul believes this is the #1 coin to buy right now The catalyst behind this surge is a massive new b...
Crypto 101 Media | Sponsored
Gold Alert: The Truth About Fort Knox Is Coming
Owning physical gold isn’t the best way to profit. I’ve found a better way to invest in gold—one that’s alr...
Golden Portfolio | Sponsored
What President Trump’s Executive Order 14154 means for your money
Nearly $3 trillion disappeared from the stock market on Thursday morning. According to Whitney Tilson - a f...
Stansberry Research | Sponsored
How to invest in Elon Musk’s Optimus before its launch
Elon Musk is set to completely take over the AI industry with Optimus… A breakthrough AI-powered robot that El...
InvestorPlace | Sponsored
Most traders are panicking. We’re cashing in
Most traders are panicking right now. Bitcoin’s dropping. Altcoins are bleeding. The stock market’s a mess....
Crypto Swap Profits | Sponsored